/*
 * Copyright 1999-2004 Alibaba.com All right reserved. This software is the confidential and proprietary information of
 * Alibaba.com ("Confidential Information"). You shall not disclose such Confidential Information and shall use it only
 * in accordance with the terms of the license agreement you entered into with Alibaba.com.
 */
package action.expr.ast;

/**
 * һ�����������'+', '-'
 * 
 * @author pf-miles 2011-6-17 ����03:54:55
 */
public enum OpLevel1 {
    ADD {

        public String toString() {
            return "+";
        }
    },
    MINU {

        public String toString() {
            return "-";
        }
    };
}
